drm/amd/display: Roll core_sink into dc_sink

drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c

drivers/gpu/drm/amd/display/dc/core/dc.c

drivers/gpu/drm/amd/display/dc/core/dc_link.c

drivers/gpu/drm/amd/display/dc/core/dc_resource.c

drivers/gpu/drm/amd/display/dc/core/dc_sink.c

drivers/gpu/drm/amd/display/dc/core/dc_stream.c

drivers/gpu/drm/amd/display/dc/dc.h

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c

drivers/gpu/drm/amd/display/dc/inc/core_types.h